To do the F-4 right would call for a voice from the back seat. Just a voice, like we had in Jane's F-15 that used to tell us "Bandit at three o'clock," or "fence check!" or "ten seconds to target!"
I'm thinking full on RIO. For me who cannot remember all the buttons for the radar it sure would be nice with an AI (or human) locking up the baddies. Maybe the guy could take the wheel on those long return flights too.
I hope this excellent dcs world idea works out and that some of those talented modders really join forces and pull together towards a common goal. I'm sure getting the Mig21 and I hope a new combat theatre will follow, be it asia, mid east or northern europe.